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Beginner to Advanced Computing and Logic Building

Electronic Voting: Application of Unique/Distinct Values

Learn to create an electronic voting program using distinct and unique values.

We'll cover the following...

Electronic voting

The election took place in a parliament with nine candidates competing with each other. Make a program to check who wins the election. Read the data from the Votes.txt file (as given in the playground).

The file format is the following:

9 Total number of candidates, like here 9 means 9 candidates competing
1. Name 1
2. Name 2
3. .
4. .
9. Name 9

50 Total votes
1 2 3 2 7 9 1 4 ... Total 50 votes, where each number represents a vote v cast for the vth candidate.

Sample Output

 Candidate Name     Votes

1. Bernie      14
2. Donald      6
3. Nawaz       5
4. Benazir     6
5. Vladimir    5
6. Justin      5
7. Jonathan    2
8. Nehru       6
9. Bilawal     11

The compiled result
Bernie    :   **************  14 votes
Donald    :   ******  6 votes
Nawaz     :   *****  5 votes
Benazir   :   ******  6 votes
Vladimir  :   *****  5 votes
Justin    :   *****  5 votes
Jonathan  :   **  2 votes
Nehru     :   ******  6 votes
Bilawal   :   ***********  11 votes

Bernie won the election.
--------------------------------------
The compiled sorted result
Bernie    :   **************  14 votes
Bilawal   :   ***********  11 votes
Donald    :   ******  6 votes
Benazir   :   ******  6 votes
Nehru     :   ******  6 votes
Nawaz     :   *****  5 votes
Vladimir  :   *****  5 votes
Justin    :   *****  5 votes
Jonathan  :   **  2 votes

Bernie won the election.

Implementation details

Memory requirement:

We need the following variables in our program:

int voters; // No of voters
int noc = 9;  // No of candidates
int vote_cast[voters];  // To store every vote read from file
int candidates_votes[noc] = {0};   // To store the vote-count of every candidate
           // candidates_votes[1] holds the votes of candidate 1
           // candidates_votes[2] holds the votes of candidate 2
           // ....
           // candidates_votes[9] holds the votes of candidate 9


string candidate_names[noc];  // to store the name of every candidate

Below is the flow of the program.

Step 1: Reading the voting file

Reading involves loading inside vote_cast[] along with the size voters and reading the number of candidates noc and their names candidates_name[], hence the following prototype:

void read(int &voters, int vote_cast[], int &no_of_candidates, string candidate_names[]);

Instruction: Write your implementation of the above function in the editor at the end of the lesson.

Step 2: Computing the results

For compiling, we must iterate through all the votes, i.e., vote_cast[] and increment the count of every candidate respectively. For this we should implement the following function:

void computeResult(int candidates_votes[], int vote_cast[], int voters);

Instruction: Write your implementation of the above function in the editor at the end of the lesson.

Step 3: Displaying the results

To display every candidate’s name and votes, we should make the following function:

void displayResult(int candidates_votes[], string candidate_names[], int noc);

Instruction: Write your implementation of the above function in the editor at the end of the lesson.

Step 4: Plotting the results

Display the entire result with a bar graph horizontally (made up of stars such that every candidate’s name must be followed by the *s followed by the exact count.

void resultPlot(int candidates_votes[], string candidate_names[], int noc);

Instruction: Write your implementation of the above function in the editor at the end of the lesson.

Step 5: Sorting the result (using the attained votes)

In this step, we would like to sort by attained votes and based on that, sort the names as well.

  • Hint: The comparison needs to be done based on votes, and swapping needs to be done on both candidate_name[] and candidates_votes[].

Instruction: Write your implementation of the above functions here, and change the Voting.txt file in whatever way you want.

C++
#include<iostream>
#include<fstream>
#include<string>
#include<iomanip>
using namespace std;
#define capacity 100
void read(int &voters, int vote_cast[ ], int &no_of_candidates, string candidate_names[]);
void computeResult(int candidates_votes[ ], int vote_cast[ ], int voters);
void displayResult(int parties[ ], string candidate_names[ ], int noc);
void resultPlot(int candidates_votes[ ], string candidate_names[ ], int noc);
int sortCandidates(int candidates_votes[], string candidate_names[], int noc);
int main()
{
	// Write your code here
	return 0;
}
void read(int &voters, int vote_cast[ ], int &noc, string candidate_names[])
{
    // Write your code here
}
void computeResult(int candidates_votes[ ], int vote_cast[ ], int voters)
{
	// Write your code here
}
void displayResult(int candidates_votes[ ], string candidate_names[ ], int noc)
{
	// Write your code here
}
void resultPlot(int candidates_votes[ ], string candidate_names[ ], int noc)
{
	// Write your code here
}
int sortCandidates(int candidates_votes[], string candidate_names[], int noc)
{
   // Write your code here
}

Write down the main flow of the program and complete the main() function first. Step by step, make all the functions and test them one by one.